<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <!-- <button>点击</button> -->
  <input type="text">
  <script>
    // const btn = document.querySelector('button')
    // btn.addEventListener('click', function (e) {
    //   console.log(e)
    // })

    const input = document.querySelector('input')
    input.addEventListener('keyup', function (e) {
      // console.log(11)
      // console.log(e.key)
      if (e.key === 'Enter') {
        console.log('我按下了回车键')
      }
    })
  </script>
</body>

</html>